Thank you from Toronto, Canada. I have started researching these and all the questions you answered are what I had in mind...do they work in cold weather....are they really that cost effective etc. Great video and liked the part from 9 mins that compares and outdoor A/C compressor to heat pump. I was under the impression that when I replace my natural gas furnace, I would still have my old a/c unit. Only now learnt that this does both...heating and cooling
You are welcome. I appreciate the feedback and sharing your experience! I hope you‘ll enjoy the feeling of cleaning heating and cooling. Best of luck with your system.
I live on Long Island (PSEG LI). Heating oil was $2.20 a year ago, today it's $5.50!!! I use about 1,000 gallons/year. I'm considering replacing my old central air system with an A/C - heat pump unit to heat in the spring and fall to mitigate the high oil prices.
@@zlmdragon. My house is concrete. Attic floor is insulated. Heat pump was installed on Saturday, will see how it works. Any oil savings is good, who knows where prices will go after the midterms.
I just got a 8 ton Mitsubishi Mini splt installed in my home (8 heads total, 4 downstairs, 4 upstairs) I am normally paying $1000 a month in propane in the winter. i can't wait to see the savings.
You are reading that table incorrectly. Only the red numbers show savings in electricity. The table also does not take into account fuel costs/savings.
To answer your question of how can air source heat pumps be so cost effective. It is because very few consider anything more than a perfect heat pump running perfectly for it's complete life span which rarely happens. Maintenance and service costs will be much more with a heat pump if you can find a technician with the skill to do the job.
What is the base minimum outdoor ambient temperature required for an air source heat pump to work without having to use the backup electric-resistance heating element for supplying auxillary heat.
This depends on the heat pump. I do not work nor receive commission from eco2. But Harvest Thermal uses their systems and I trust Harvest Thermal when it comes to using the most efficient and most sustainable heating. The SANCO2 will operate at temperatures as low as -29 °C, which means it will not require a backup heating coil even for the Montreal-Ottawa corridor, which in practice, rarely ever sees temperatures below -26 °C. This unit will actually provide 3.5 kW of heat even at -25 °C, with an efficiency of 170%. Its overall efficiency over the whole year, based on the hot water consumption of a family of four each taking an 8 minute shower every morning with a regular shower head delivering 9.5 L/min, would be about 340%.
Heat the air, not a heap of hardware! It is the air you feel. If you do not turn off but only turn down to 18 Deg C and up to 23 or 24 during daytime the internal of your dwelling will stay warm and it does not cost a bomb. Must keep screens in evaporator clean, vacuum dust off about 4 to 6 weeks depending on your dust. We have one 6.6 K/w unit which runs most efficiently at 1.75 K/w output, keeps over 100 M2 with 2.700 stud very warm. Heat pumps work best if run constantly so furniture and fittings do not get cold and have to be rewarmed. Our neighbors have new house with underfloor pipes for heating with heat pump and it is disaster! Too much energy used heating concrete floor and hardware. Get good engineering advice and design and be forever grateful!!
It's really annoying that air source heat pumps frequently use(at least in the U.S) a different rating method than ground source heat pumps. You have to hunt around for the COP of air source heat pumps and interpolate between the given temperatures.
I agree and am sorry about the inconvenience this causes. I wish heat pump ratings where more standardised. I love graphs that show the COP over ambient temperature. To get the whole picture, you need to know the flow temperature (and kind of refrigerant). Keep in mind that design and installation play a crucial role. A great installer can get decent results with an ok unit and a bad installer can reduce the performance of an excellent model.
@@NetZeroTech that's terrible. How can the installation be messed up? There are very few companies in my area that do ground source, and I assumed it was a standardized process. Do you know if airsource heatpumps are as difficult to install or subject to so much variability between installers? I'm thinking of going with an airsource heatpump and maybe selling it or moving it if I later get a ground source heatpump.
@@justcommenting4981 Good question. Experience and a good track record of the installer matter in this business, to maximize the efficiency of the system. So, yes, if you want to maximize long-term savings, it is important to choose a good installer for an air-source heat pump or any heat pump system. And for any heating and cooling system, good insulation can save you a lot of money long-term. In any case, even if it's not the best installer and even if you don't reach the maximum potential of the system, you'll create significants savings in almost all cases by switching to a heat pump system. I have yet to meet anyone who regrets switching. I hope this helps. I'd be happy to learn how things turn out for you.
What is COP of your system ? Sanden claims that at 17F they have COP 2.8 but the heat pump has to heat water from 45 F to 145 F but in your system temperature of returning water after heating space shall be higher and as a result higher COP
There are different systems presented. To my knowledge, the Sanden air to water heat pump has a coefficient of performance of around 5.25 at ambient temperatures of around 68 F ie 20 deg C. Being able to choose when to operate the heat pump as a function of outdoor ambient temperature can really help increase performance, which is something Harvest Thermal systems do.
@@NetZeroTech in my state electricity rate stays the same no matter what time of day . The website does not give information about efficiency of your system and your COP of 5.25 at 68F does not help either since I do not turn heat on at 68
@@andreycham4797 Ok, what is your state and utility? Many utilities are planning on introducing time-of-use rates in the future or already have pilot projects people can participate in. Some systems can optimise when to operate based on ambient temperature. This increases the efficiency of the system, which reduces your electricity consumption and electric bill independent of time-of-use rates. What temperature do you prefer having at home? Thank you.
Thank you from Toronto, Canada. I have started researching these and all the questions you answered are what I had in mind...do they work in cold weather....are they really that cost effective etc. Great video and liked the part from 9 mins that compares and outdoor A/C compressor to heat pump. I was under the impression that when I replace my natural gas furnace, I would still have my old a/c unit. Only now learnt that this does both...heating and cooling
You are welcome. I appreciate the feedback and sharing your experience! I hope you‘ll enjoy the feeling of cleaning heating and cooling. Best of luck with your system.
I live on Long Island (PSEG LI). Heating oil was $2.20 a year ago, today it's $5.50!!! I use about 1,000 gallons/year. I'm considering replacing my old central air system with an A/C - heat pump unit to heat in the spring and fall to mitigate the high oil prices.
@@zlmdragon. My house is concrete. Attic floor is insulated. Heat pump was installed on Saturday, will see how it works. Any oil savings is good, who knows where prices will go after the midterms.
@@Hubjeep Great! Very exciting. How did it go so far?
Hi @@zlmdragon., sounds like you have great experience. Thanks for sharing.
Hi, I hope you have made progress towards a less expensive and more sustainable heating source and insulation? Hope things are well with you.
Thanks./ I'm considering a condo with electric heating and this suggests a better alternative.
You are welcome. 😀 Thank you for sharing your thoughts. 🙏 Katha
I just got a 8 ton Mitsubishi Mini splt installed in my home (8 heads total, 4 downstairs, 4 upstairs)
I am normally paying $1000 a month in propane in the winter.
i can't wait to see the savings.
Yay! Awesome. I'm happy for you. It would be great to learn how it goes. Enjoy the new system and the savings. 😀
Did you end up saving money? I am looking at a simar system. How much did your electric bill increase?
Great explanation. Thanks.
You are reading that table incorrectly. Only the red numbers show savings in electricity. The table also does not take into account fuel costs/savings.
Thanks for the heads up, will double check.
Thank you Katha!
You are very welcome. 😀 Thanks for leaving a comment. 🙏
To answer your question of how can air source heat pumps be so cost effective. It is because very few consider anything more than a perfect heat pump running perfectly for it's complete life span which rarely happens. Maintenance and service costs will be much more with a heat pump if you can find a technician with the skill to do the job.
Thank you for watching and sharing your thoughts. 🙏 Katha
What is the base minimum outdoor ambient temperature required for an air source heat pump to work without having to use the backup electric-resistance heating element for supplying auxillary heat.
This depends on the heat pump. I do not work nor receive commission from eco2. But Harvest Thermal uses their systems and I trust Harvest Thermal when it comes to using the most efficient and most sustainable heating. The SANCO2 will operate at temperatures as low as -29 °C, which means it will not require a backup heating coil even for the Montreal-Ottawa corridor, which in practice, rarely ever sees temperatures below -26 °C. This unit will actually provide 3.5 kW of heat even at -25 °C, with an efficiency of 170%. Its overall efficiency over the whole year, based on the hot water consumption of a family of four each taking an 8 minute shower every morning with a regular shower head delivering 9.5 L/min, would be about 340%.
Informative. Well done
Thank you! 🙏 Glad you think so. 😊
Heat the air, not a heap of hardware! It is the air you feel. If you do not turn off but only turn down to 18 Deg C and up to 23 or 24 during daytime the internal of your dwelling will stay warm and it does not cost a bomb. Must keep screens in evaporator clean, vacuum dust off about 4 to 6 weeks depending on your dust. We have one 6.6 K/w unit which runs most efficiently at 1.75 K/w output, keeps over 100 M2 with 2.700 stud very warm. Heat pumps work best if run constantly so furniture and fittings do not get cold and have to be rewarmed. Our neighbors have new house with underfloor pipes for heating with heat pump and it is disaster! Too much energy used heating concrete floor and hardware. Get good engineering advice and design and be forever grateful!!
Thank you for sharing!
It's really annoying that air source heat pumps frequently use(at least in the U.S) a different rating method than ground source heat pumps. You have to hunt around for the COP of air source heat pumps and interpolate between the given temperatures.
I agree and am sorry about the inconvenience this causes. I wish heat pump ratings where more standardised. I love graphs that show the COP over ambient temperature. To get the whole picture, you need to know the flow temperature (and kind of refrigerant). Keep in mind that design and installation play a crucial role. A great installer can get decent results with an ok unit and a bad installer can reduce the performance of an excellent model.
@@NetZeroTech that's terrible. How can the installation be messed up? There are very few companies in my area that do ground source, and I assumed it was a standardized process. Do you know if airsource heatpumps are as difficult to install or subject to so much variability between installers?
I'm thinking of going with an airsource heatpump and maybe selling it or moving it if I later get a ground source heatpump.
@@justcommenting4981 Good question. Experience and a good track record of the installer matter in this business, to maximize the efficiency of the system. So, yes, if you want to maximize long-term savings, it is important to choose a good installer for an air-source heat pump or any heat pump system. And for any heating and cooling system, good insulation can save you a lot of money long-term.
In any case, even if it's not the best installer and even if you don't reach the maximum potential of the system, you'll create significants savings in almost all cases by switching to a heat pump system. I have yet to meet anyone who regrets switching. I hope this helps. I'd be happy to learn how things turn out for you.
What is COP of your system ? Sanden claims that at 17F they have COP 2.8 but the heat pump has to heat water from 45 F to 145 F but in your system temperature of returning water after heating space shall be higher and as a result higher COP
There are different systems presented. To my knowledge, the Sanden air to water heat pump has a coefficient of performance of around 5.25 at ambient temperatures of around 68 F ie 20 deg C.
Being able to choose when to operate the heat pump as a function of outdoor ambient temperature can really help increase performance, which is something Harvest Thermal systems do.
@@NetZeroTech why do you want to heat your house at comfortable 68 degrees temperature?
@@andreycham4797 What do you mean? What's your preferred home temperature?
@@NetZeroTech in my state electricity rate stays the same no matter what time of day . The website does not give information about efficiency of your system and your COP of 5.25 at 68F does not help either since I do not turn heat on at 68
@@andreycham4797 Ok, what is your state and utility? Many utilities are planning on introducing time-of-use rates in the future or already have pilot projects people can participate in. Some systems can optimise when to operate based on ambient temperature. This increases the efficiency of the system, which reduces your electricity consumption and electric bill independent of time-of-use rates. What temperature do you prefer having at home? Thank you.
WOW YOU HAVE BEAUTIFUL EYES....
Hi, any takeaways regarding content? Thanks.